Ch. 11B: Fundamentals of the Nervous System
What happens to the membrane when it is depolarized?
a. it becomes more negative
b. it becomes more positive
c. it stays the same
b. it becomes more positive
True or False: White matter is unmyelinated.
False. White matter is myelinated.
In the spinal cord, gray matter is ____, while white matter is _____.
a. internal
b. external
In the spinal cord, gray matter is internal, while white matter is external.
Thermoreceptors ______.
a. respond to chemicals
b. respond to touch, pressure, vibration, etc.
c. respond to light energy
d. are sensitive to changes in temperature
d. are sensitive to changes in temperature
Which cranial nerve innervates facial expression?
a. olfactory
b. facial
c. accessory
d. hypoglossal
b. facial
Which type of signal operates over short distances?
a. Action potentials
b. Graded potentials
b. Graded potentials
The cerebral cortex is made out of _1_ matter and is _2_.
1a. white
1b. gray
2a. external
2b. internal
The cerebral cortex is made out of gray matter and is external.
True or False: Dorsal horns receive sensory input.
True!
This type of receptor informs the brain of one's movements.
a. exteroceptors
b. interoceptors
c. proprioceptors
c. proprioceptors
How many cranial nerves are there?
a. 12
b. 16.
c. 24
d. 36
How many Na+ (sodium) and K+ (potassium) ions move in and out of the cell with the sodium-potassium pump?
3 Na+ (sodium) pumped out
2 K+ (potassium) pumped in
Which structure of the brain is the main control center for homeostatic control?
a. thalamus
b. epithalamus
c. hypothalamus
d. cerebellum
c. hypothalamus
What is the composition of ventral horns?
a. sensory neurons
b. motor neurons
b. motor neurons
Which connective tissue covering encloses the entire nerve?
a. endoneurium
b. perineurium
c. epineurium
c. epineurium
Which cranial nerve innervates hearing and balance?
a. abducens
b. vagus
c. vestibulocochlear
d. oculomotor
c. vestibulocochlear
a. myelinated
b. non-myelinated
a. myelinated
Which structure of the brain controls automatic behaviors necessary for survival?
a. brain stem
b. corpus callosum
c. midbrain
d. thalamus
a. brain stem
What is the function of ventral horns?
a. they receive sensory input
b. they make the spinal cord look nice
c. they send motor output towards skeletal muscle
d. they send motor output towards involuntary muscle
c. they send motor output towards skeletal muscle
These sensory neurons conduct impulses from the receptor level to the spinal reflexes
a. first-order sensory neurons
b. second-order sensory neurons
c. third-order sensory neurons
a. first-order sensory neurons
How many pairs of spinal nerves are there?
a. 12
b. 24
c. 16
d. 31
d. 31
Which event is caused by K+ (potassium) ions flowing out of the cell?
a. depolarization
b. repolarization
c. hyperpolarization
b. repolarization
Which of the following best describes the main function of Broca's Area?
a. solving complex, multitask problems
b. processes emotions related to social interactions
c. motor activity of speech and other voluntary activity
d. helps plan movements of patterned motor skills
c. motor activity of speech and other voluntary activity
What is the composition of dorsal horns?
a. interneurons
b. motor neurons
c. sensory neurons
d. silly neurons
a. interneurons
This level of neural integration in sensory systems processes information in ascending pathways.
a. receptor level
b. circuit level
c. perceptual level
b. circuit level
In the reflex arc, which of the following is the site of stimulus action?
a. receptor
b. sensory neuron
c. integration center
d. motor neuron
e. effector
a. receptor